{"id":64872,"date":"2023-03-20T18:19:58","date_gmt":"2023-03-20T18:19:58","guid":{"rendered":"https:\/\/one.sightlinemg.com\/defensenews\/uncategorized\/2023\/03\/20\/us-japan-exploring-partnership-on-hypersonic-missile-interceptor\/"},"modified":"2026-08-08T00:40:50","modified_gmt":"2026-08-08T00:40:50","slug":"us-japan-exploring-partnership-on-hypersonic-missile-interceptor","status":"publish","type":"post","link":"https:\/\/one.sightlinemg.com\/defensenews\/pentagon\/2023\/03\/20\/us-japan-exploring-partnership-on-hypersonic-missile-interceptor\/","title":{"rendered":"US, Japan exploring partnership on hypersonic missile interceptor"},"content":{"rendered":"\n<p class=\"wp-block-paragraph\">WASHINGTON \u2014 The U.S. and Japan are exploring a partnership to <a href=\"https:\/\/www.defensenews.com\/land\/2020\/02\/05\/mda-taps-industry-to-build-interceptor-to-defend-against-hypersonic-threats\/\" target=\"_blank\">develop a hypersonic missile defense capability <\/a>as the Pentagon enters the early stages of a program to develop an interceptor capable of neutralizing hypersonic threats in the glide phase of flight.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Vice Adm. Jon Hill, who leads the U.S. Missile Defense Agency, confirmed last week that the organization is considering cooperation with Japan to work on the Glide Phase Interceptor, or GPI, <a href=\"https:\/\/www.defensenews.com\/digital-show-dailies\/smd\/2022\/08\/12\/missile-defense-agency-priorities-include-hypersonics-guam-hill-says\/\" target=\"_blank\">one of the agency\u2019s top priorities<\/a>.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u201cRight now we\u2019re exploring the opportunity to just identify what those cooperative development areas would be,\u201d Hill said at the McAleese &amp; Associates conference in Washington.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">The effort could take on similar attributes to the <a href=\"https:\/\/www.defensenews.com\/naval\/2018\/10\/26\/after-consecutive-failures-navy-has-successful-sm-3-missile-intercept\/\" target=\"_blank\">successful<\/a> U.S.-Japan development of the <a href=\"https:\/\/www.defensenews.com\/naval\/2020\/11\/17\/us-navy-destroyer-shoots-down-an-icbm-in-milestone-test\/\" target=\"_blank\">Raytheon Technologies-manufactured SM-3 block IIA program<\/a>, which the company is now building and the countries will field, Hill said.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u201cThe easy way to go with Japan is to offer up [development of] propulsion stacks because they build the second stage and the third stage on the SM-3 block IIA today,\u201d Hill explained. But this time Japan would like to get \u201ca little more into, say, the front end of the missile\u201d \u2014 the portion of the interceptor containing the warhead \u2014 he added, \u201cso we\u2019re looking for common parts.\u201d<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">But the effort is complicated because two companies are competing to design the GPI \u2014 <a href=\"https:\/\/www.defensenews.com\/pentagon\/2022\/06\/24\/raytheon-northrop-advance-in-competition-to-develop-hypersonic-weapons-interceptor\/\" target=\"_blank\">Raytheon Technologies and Northrop Grumman.<\/a> Each company won contracts to continue developing hypersonic weapons interceptors in an MDA-led competition in June 2022.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u201cThe challenge is when you\u2019ve got two [companies] in play, that means Japan has to sign up to do two different designs, knowing that one of them may be a throwaway,\u201d Hill said. \u201cThey know one of them is going to go away downstream. I don\u2019t know when that downselect will happen. It\u2019s going to depend on how well they mature technically.\u201d<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Hill said during a press briefing at the March 15 conference that MDA has a team in Japan holding an executive steering council, which is essentially a technical interchange with the Japanese government that includes acquisition, technology and logistics officials.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Following the meeting, \u201cwe\u2019ll come back, take a breather, then we\u2019ll go back out [to Japan] and we\u2019ll bring industry with us next time around so that we\u2019re not speaking for industry.\u201d<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Ideally, Hill said, industry would willingly subcontract work to a Japanese company for agreed-upon components of the interceptor, but \u201cif we can\u2019t get to that, then we\u2019ll do what we initially did in the SM-3 block IIA program, which is we directed the American company to go subcontract.\u201d<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Defeating a hypersonic weapon in its glide-phase of flight is a challenging technical problem, as the missiles can travel more than five times the speed of sound and can maneuver in flight, making it hard to predict a missile\u2019s trajectory.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">The MDA is still early in the development process \u2014 \u201cthe mission solution analysis phase,\u201d as Hill put it during a fiscal 2024 budget request briefing on March 13 at the Pentagon. \u201cWhat we\u2019re doing during this phase is determining what technologies do we need and how we can bring that together as a weapons system.\u201d<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">The budget, he added, supports \u201ca deployment or getting to that first article out there in the early [20]30s.\u201d<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><a href=\"https:\/\/www.defensenews.com\/pentagon\/2023\/03\/13\/missile-defense-agency-prioritizes-guam-in-budget-proposal\/\" target=\"_blank\">MDA is asking for $209 million in FY24<\/a> to fund the ongoing GPI competition.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">The interceptors will be designed to fit into the U.S. Navy\u2019s current Aegis ballistic missile defense-equipped destroyers. The weapon will fire from the standard vertical launching system and be integrated with the modified Baseline 9 Aegis Weapon System that detects, tracks, controls and engages hypersonic threats.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Discussions are ongoing that could lead to a partnership between the U.S. and Japan to build a hypersonic missile 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